Crustacea Decapoda and Stomatopoda. 261 



The female, 45 mm. in length, from South Hu-peh, referred by de Man ' to 

 Palaemon {Parapalaemon?) asperulus, is without doubt different. In none of Dr. 

 Annandale's specimens can I find any trace of carinae on the first abdominal somite 

 and the peraeopods differ conspicuously from de Man's account. In the case of 

 the Hu-peh specimen the merus of the second leg is 5 '2 mm. in length, the carpus 

 6-4 mm., the palm 75 mm. and the fingers 5-5 mm., proportions which differ slightly 

 from those of Shanghai individuals. In the latter specimens, moreover, there 

 is no trace of a longitudinal ridge on the outer side of the merus and carpus. The 

 last three peraeopods are also much stouter in the Hu-peh specimen, the merus of 

 the third pair being only five times, and the propodus seven times as long as 

 broad. In Dr. Annandale's examples the merus of this limb is six and a half 

 times and the propodus about nine times as long as broad. 



The specimens were deeply pigmented in life, but without any characteristic 

 markings. They were taken from smaU basket traps set among weeds in and at the 

 mouths of narrow creeks opening into the Tai Hu. They were found along with 

 Palaemon nipponensis and Leander modestus, but were much less abundant than either 

 of those species. 



Palaemon sundaicus (Heller ?), de Man. 



1862. Palaemon sundaicus. Heller, Sitz.-ber. Akad. Wiss. Wien, XIV, p. 415, pi. ii, figs. 38, 39. 

 1892. Palaemon {Eupalaemon) sundaicus, de Man, in Weber's Zool. Ergebn. Reise Niederlànd. 



Ost-Ind., II, p. 437, pi. xxvi, fig. 35. 

 1897. Palaemon {Eupalaemon) sundaicus, de Man, Zool. Jahrb., Syst., IX, p. 779 and X, 



pi. xxxvii, fig. 71 (1898). 

 1914. Palaemon sundaicus, Cowles, Philippine Journ. Sci., Sect. D, IX, p. 355, pi. ii, figs. 3, 3rt-/- 



To this species I refer a number of rather small specimens in which the chelipedes 

 (after nine months' preservation in alcohol) are deeply mottled with purplish brown. 

 They almost certainly belong to the same species as those with identical colour 

 markings described by de Man and Cowles {loc. cit. 1897 and 1914). 



De Man has described two varieties of P. sundaicus from Atjeh and Batavia, 

 distinguishing the latter under the name var. bataviana. Dr. Annandale's specimens 

 agree most nearly with the typical form. 



Of the twelve specimens in the collection, ten have 10 or 11 (usually 11) 

 teeth on the upper edge of the rostrum and 5 to 7 (usually 6) on the lower edge. 

 One specimen has 13 dorsal teeth and 6 ventral and one which has clearly suft'ered 

 injury — the antennal scale on one side being only half its normal size — has 14 teeth 

 above and 11 below. In all cases there are three teeth on the carapace behind 

 the orbital notch. Towards the apex the rostrum is always rather strongly upturned, 

 reaching beyond the antennal scale by a proportion varying from one tenth to 

 one fifth of its length. The carapace is smooth throughout. 



The second peraeopods are slender and in the larger specimens reach beyond 

 the scale by rather more than the chela and carpus. The merus, carpus and 



I De Man, Trans. Linn. Soc, Zool. (2), IX, p. 293, pi. xviii, figs. 2-8 (1904). 



